On-line monitoring system for heating surface ash deposition of coal-fired power plant boiler, and detection method of on-line monitoring system

Abstract

The invention relates to an on-line monitoring system for heating surface ash deposition of a coal-fired power plant boiler, and a detection method of the on-line monitoring system. The heating surface of the coal-fired boiler is divided into a radiation heating surface and a convection heating surface according to different heat transfer modes, corresponding ash deposition monitoring characterization parameters are selected according to the different heating surfaces, and the heating surface ash deposition degree is monitored in real time. According to the invention, real-time and historicaloperation parameters of a field distributed control system and a coal quality detector of a coal-fired power plant are downloaded, real-time data preprocessing and key parameter soft measurement are carried out, a database and an ash deposition monitoring model and a prediction model of each heating surface are built, offline data is applied to train each model, and online monitoring is realized after the target precision is reached. According to the invention, the ash deposition conditions of the different heating surfaces of the coal-fired power plant boiler can be monitored in real time, the ash deposition monitoring result of each the heating surface is output, a theoretical basis is provided for workers to judge ash blowing operation, and then the problem of steam waste caused by lowheat exchange efficiency of the boiler and excessive ash blowing due to insufficient ash blowing, is solved.

Description

technical field [0001] The invention belongs to the cross technical field of computer monitoring and thermal power generation, and in particular relates to an on-line monitoring system for ash on the heating area of ​​a coal-fired power plant boiler and a detection method thereof. Background technique [0002] The power industry plays an indispensable role in national production and life. With the idea of ​​promoting resource conservation and utilization put forward by our country, clean energy power generation technologies represented by hydropower, wind power, solar power and nuclear power have made great progress. . However, my country's energy structure determines that my country's power supply will still be dominated by thermal power generation for a long time. Coal-fired thermal power generation mainly uses pulverized coal combustion to generate energy, which brings a lot of pollution emission problems. Therefore, it is necessary to improve the thermal efficiency of ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose an on-line monitoring system for ash on the heating surface of a coal-fired power plant boiler and its detection method, so as to overcome the need to install additional measuring points and the calculation is too cumbersome in the existing technology for on-line monitoring of ash on the heating surface question

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